Company lists · Data refreshed September 2026

Top 25 Impact measurement consultants based in the United States

Name: Impact measurement consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,489 companies tracked

RevenueBase identified 1,489 impact measurement consultants headquartered in the United States as of September 2026 and tracks 7,576 professional contacts across them, including 2,602 with verified work emails. New York is the largest hub.

This list covers impact measurement consultants headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

1,489Companies

7,576Contacts tracked

2,602Verified emails

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The 25 largest impact measurement consultants based in the United States

Ranked by team size

Top 25 of 1,489 impact measurement consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to impact measurement consultants: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Lucas Group	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 20, 2026	10001+	756 contacts →
	Indirect evidence “Ultimate Minds is a professional consulting and marketing firm dedicated to empowering businesses, nonprofits, and startups with smart, affordable, and results-driven solutions.” Source: RevenueBase Database · checked Sep 20, 2026
2	Nonprofit Hr, Powered By Onedigital	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	10001+	300 contacts →
	Partial evidence “Nonprofit HR was founded with one goal in mind: to strengthen the social impact sector by strengthening its people.” Source: RevenueBase Database · checked Sep 20, 2026
3	TCC Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	n/a	232 contacts →
	Indirect evidence “TCC Group collaborates with leaders to solve complex social problems.” Source: RevenueBase Database · checked Sep 20, 2026
4	BWF	Indirect evidence	Usa, United StatesHQ checked Sep 20, 2026	51-200	125 contacts →
	Indirect evidence “BWF Zuri is the nonprofit sector’s most comprehensive fundraising consulting company, helping organizations thrive in a rapidly changing landscape.” Source: RevenueBase Database · checked Sep 20, 2026
5	Zuri Group	Indirect evidence	Bend, OR, United StatesHQ checked Sep 20, 2026	51-200	106 contacts →
	Indirect evidence “Zuri Group partners with nonprofit organizations to turn big ideas into reality.” Source: RevenueBase Database · checked Sep 20, 2026
6	Campbell & Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	102 contacts →
	Partial evidence “Campbell & Company is a national nonprofit consulting firm that helps organizations create greater impact through fundraising, communications and strategic information services.” Source: RevenueBase Database · checked Sep 20, 2026
7	Third Plateau	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	51-200	88 contacts →
	Strong evidence “One of Fast Company's 2025 Best Workplaces for Innovators!* Third Plateau is an impact consultancy on a mission to build lasting social good.” Source: RevenueBase Database · checked Sep 20, 2026
8	Rios Partners	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 20, 2026	51-200	86 contacts →
	Indirect evidence “Rios Partners provides management consulting services to commercial, non-profit, and government clients in the Washington, D.C.” Source: RevenueBase Database · checked Sep 20, 2026
9	Schultz & Williams	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	51-200	83 contacts →
	Indirect evidence “Schultz & Williams is a national consulting firm dedicated to helping nonprofits of all types and sizes achieve financial stability, meet organizational goals, and support greater…” Source: RevenueBase Database · checked Sep 20, 2026
10	The Cloudburst Group	Indirect evidence	Landover, MD, United StatesHQ checked Sep 20, 2026	51-200	80 contacts →
	Indirect evidence “At The Cloudburst Group, our mission is to improve programs that benefit socially and economically disadvantaged persons in the U.S.” Source: RevenueBase Database · checked Sep 20, 2026
11	BCT Partners	Indirect evidence	East Brunswick, NJ, United StatesHQ checked Sep 20, 2026	51-200	80 contacts →
	Indirect evidence “At BCT Partners we harness the power of expertise and innovation to solve complex social problems, transform lives, and create lasting change.” Source: RevenueBase Database · checked Sep 20, 2026
12	Empower Success Corps	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	74 contacts →
	Indirect evidence “At ESC, our mission is to empower nonprofits to achieve their goals & contribute to a more just and equitable world.” Source: RevenueBase Database · checked Sep 20, 2026
13	The Khana Group	Partial evidence	New York, United StatesHQ checked Sep 20, 2026	11-50	72 contacts →
	Partial evidence “TKG is a leading social impact research, evaluation, data collection, and strategy firm with offices in Ghana, Nigeria, Guinea, Liberia, Sierra Leone, and the US.” Source: RevenueBase Database · checked Sep 20, 2026
14	Clutch	Indirect evidence	Rancho Cordova, CA, United StatesHQ checked Sep 20, 2026	51-200	66 contacts →
	Indirect evidence “Real Solutions.” Source: RevenueBase Database · checked Sep 20, 2026
15	Freedman Consulting, LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	61 contacts →
	Indirect evidence “Freedman Consulting, LLC, a mission-driven firm, offers strategic consulting services to foundations, nonprofit organizations, and public interest coalitions, advising many of the…” Source: RevenueBase Database · checked Sep 20, 2026
16	Holoniq	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	60 contacts →
	Partial evidence “The world's leading impact intelligence platform.” Source: RevenueBase Database · checked Sep 20, 2026
17	Dickersonbakker	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 20, 2026	11-50	56 contacts →
	Partial evidence “We help nonprofits amplify their impact to create more good in the world.” Source: RevenueBase Database · checked Sep 20, 2026
18	Redstone Strategy Group	Indirect evidence	Boulder, CO, United StatesHQ checked Sep 20, 2026	11-50	50 contacts →
	Indirect evidence “Redstone is a boutique consulting firm with offices in California, Colorado, and New York.” Source: RevenueBase Database · checked Sep 20, 2026
19	Legacyworks Group	Partial evidence	Santa Barbara, CA, United StatesHQ checked Sep 20, 2026	11-50	47 contacts →
	Partial evidence “LegacyWorks Group brings transformative impact initiatives to life through an array of services including Strategy Consulting and Planning, Collaborative Facilitation, Data…” Source: RevenueBase Database · checked Sep 20, 2026
20	Armstrong Mcguire & Associates	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 20, 2026	11-50	46 contacts →
	Indirect evidence “As nonprofit leaders, you have to stay agile and resilient to remain profitable, sustainable, and ahead-always ensuring that growth equals funding, and that funding equals…” Source: RevenueBase Database · checked Sep 20, 2026
21	Cosmic	Partial evidence	Santa Cruz, CA, United StatesHQ checked Sep 20, 2026	n/a	45 contacts →
	Partial evidence “Cosmic equips social impact leaders and brands with the strategies, tools, and mindset needed to win in the attention economy.” Source: RevenueBase Database · checked Sep 20, 2026
22	Changing OUR World	Partial evidence	New York, United StatesHQ checked Sep 20, 2026	51-200	44 contacts →
	Partial evidence “Changing Our World is a trusted social impact consulting firm that advises leading corporations and nonprofit organizations.” Source: RevenueBase Database · checked Sep 20, 2026
23	Global Insight	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	44 contacts →
	Partial evidence “We support purpose-driven organizations, donors, and investors to understand, measure, and communicate their impact.” Source: RevenueBase Database · checked Sep 20, 2026
24	Fuse Fundraising	Indirect evidence	Reston, VA, United StatesHQ checked Sep 20, 2026	11-50	41 contacts →
	Indirect evidence “We help nonprofits amplify their good by fusing strategy, analytics and human insight.” Source: RevenueBase Database · checked Sep 20, 2026
25	Institute For Development Impact - I4di	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	37 contacts →
	Strong evidence “The Institute for Development Impact (I4DI) is rethinking impact measurement and learning to shape how organizations invest, operate, and improve.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: impact measurement consultants. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names impact measurement consultants.
Partial evidence: Its own public description names part of impact measurement consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name impact measurement consultants. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,489 impact measurement consultants based in the United States

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Impact measurement consultants based in the United States at a glance

As of Sep 20, 2026

34.3%Verified-email coverage

5.1Average contacts per company

1-10Median size (employees)

6.0%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

1,319

11-50

146

51-200

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,489 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among impact measurement consultants, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “impact measurement consultants”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names impact measurement consultants), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among impact measurement consultants, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 2,602 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Impact measurement consultants by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names impact measurement consultants, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many impact measurement consultants are there based in the United States?

RevenueBase identified 1,489 impact measurement consultants headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Lucas Group, headquartered in Los Angeles, tops this list with the largest team on record.

Which city has the most impact measurement consultants?

New York leads with 90 headquartered companies, followed by Chicago (73) and Washington (72).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,602 verified decision-maker contacts tracked across these 1,489 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.